KR200405936Y1 - Device system, consisting of a battery-operated electric device, rechargable battery unit and battery charger - Google Patents

Abstract

In the device system, the battery unit 10 detects operating parameters of the at least one battery unit 10 and switches means 25 and 31 for controlling the charging and discharging process of the battery unit 10 by controlling a control signal according to the operating parameters. ), A monitoring circuit 14 for supplying. The switching means 25, 31 are provided in the electric device 20 and the charging device 30. The control signal is supplied by the battery unit 10 to the switching means in the electric device 20 and the charging device 30. By repositioning the switching means 25, 31 from the battery unit 10 into the electrical device 20 and the charging device 30, the heat generation in the battery unit 10 and the size of the battery unit are reduced.

Device Systems, Battery Units, Battery Chargers, Electrical Devices, Monitoring Circuits

Description

DEVICE SYSTEM, CONSISTING OF A BATTERY-OPERATED ELECTRIC DEVICE, RECHARGABLE BATTERY UNIT AND BATTERY CHARGER}

1 is a block circuit diagram of a rechargeable battery unit.

2 is a block circuit diagram of an electrical device.

3 is a block circuit diagram of a battery charging device.

<Explanation of symbols for the main parts of the drawings>

1 to 3: supply connection

4, 5: power connection

10: battery unit

11: battery cell

12, 13: supply line

14: monitoring circuit

15, 26: signal line

16: temperature sensor

20: electric device

21: electric drive unit

22, 23: supply line

24: switch

25, 31: switching means

30: charging device

32 to 34 supply line

The present invention relates to an apparatus system consisting of at least one battery operated electrical device, a rechargeable battery unit and a battery charging device, the battery unit detecting operating parameters of at least one battery unit, and controlling signals according to the parameters of the battery. It includes a monitoring circuit for supplying for the switching means for controlling the charging or discharging process of the battery unit.

EP 665 628 can on the one hand be connected to an electrical device for supplying electrical energy to a battery operated electrical device, and on the other hand it can be mounted in a charging device for storing energy from the device in a recharging device. A rechargeable battery unit is described. For example, monitoring to detect at least one operating parameter such as charging and discharging current or terminal voltage of the battery unit and controlling the charging and discharging process of the battery unit and supplying it to the switching means provided in the battery unit. The circuit is provided in the battery unit. This means, for example, that the monitoring circuit interrupts the flow of current from the battery unit to the electrical device connected thereto if the monitoring circuit indicates that it is below the preset discharge threshold. Similarly, as soon as the monitoring circuit indicates exceeding the preset charge threshold, if the switching means is initiated via a control signal of the monitoring circuit, the switching means interrupts the current flow from the charging device to the battery unit.

The rechargeable battery unit known from EP 665 628 is provided with switching means for controlling the charging and discharging process of the battery unit as well as the monitoring circuit. In particular, when using a battery unit through which very high charge and discharge currents flow, for example an electrically operated device operated at a relatively high power, the switching means connect very high power causing a relatively high heat generation in the battery unit. You have to. In addition, when the switching means for controlling the charging and discharging processes and the monitoring circuit are integrated, the size of the battery unit increases.

In addition, this type of battery unit that includes switching means for controlling the charging and discharging processes in addition to the monitoring circuit is expensive. In a system of devices consisting of a battery operated electrical device, a rechargeable battery unit and a battery charging device, great wear occurs on the battery unit. Therefore, it is not desirable for the battery unit to be as expensive as one electronic circuit is integrated as possible.

Accordingly, the present invention provides at least one battery operated type of the type described above, which costs as little as possible for electronic circuits in the battery unit in order to prevent high heat generation in the battery unit and to keep the size of the battery unit as small as possible. It is an object to provide a device system consisting of an electrical device, a rechargeable battery unit and a battery charging device.

The stated purpose is to detect operating parameters of at least one battery unit and control signals according to the at least one operating parameter, according to the claimed device system and the claimed individual devices such as battery units, battery charging devices and battery operated electrical devices. It is achieved by providing a monitoring circuit in the battery unit for supplying the. Switching means to which control signals for controlling the charging and discharging processes of the battery unit are supplied are provided in the electric device and the charging device. That is, when the battery unit is connected to the electric device, the switching means provided in the electric device controls the power of the electric device according to the control signal transmitted by the battery unit. When the battery unit is connected to the charging device, the switching means provided in the charging device controls the charging current delivered to the battery unit in accordance with a control signal supplied by the battery unit.

Switching means for controlling the charging and discharging process of the battery unit are relocated from the battery unit into a device that can be connected thereto. Thus, under the large wear in the device system, the cost of the most frequently replaced unit becomes low.

According to the dependent claims, one or more operating parameters, such as current drawn into or out of the battery unit and / or terminal voltage of the battery unit and / or the temperature or temperature related variables of the battery unit, are added to the monitoring circuit in the battery unit. It is preferable to detect by.

The present invention is described in detail below with reference to the embodiments shown in the drawings.

1 to 3 show a block circuit diagram of three units belonging to one device system. 1 shows a rechargeable battery unit, FIG. 2 preferably shows an electrical device 20 such as a tool (for example, an electric screwdriver, a drill, a hammer drill, a chainsaw, a grinder, etc.), and FIG. Shown is a battery charging device 30. In the battery unit 10 shown in FIG. 1, the energy supply of the battery unit may be connected to the electric device 20 on the one hand, and the rechargeable part may be connected to the charging device 30 on the other hand. The connections 1, 2, 3 guided from the battery unit 10 have corresponding connections 1, 2, 3 which are provided with the same reference numerals in the electrical device 20 and the charging device 30.

The battery unit 10 includes one or more battery cells 11 that are rechargeable. Supply lines 12, 13 are guided from the positive and negative poles of the battery cells to the external supply connections 1, 2. The battery unit 10 is provided with a monitoring circuit 14. The monitoring circuit 14 detects the operating parameters of one or more battery units, to be exact, the battery cells. The operating parameters may include, for example, a discharge current drawn from the battery unit at the connection of the electrical device 20 and a charge current drawn into the battery unit from the connection of the charging device 30 and / or the terminal voltage measured at the battery cell and And / or variables related to the temperature or temperature of the battery cell. The temperature sensor 16 is disposed near the battery cell to detect the temperature of the battery cell.

The monitoring circuit 14 derives control signals for the charging and discharging process of the battery unit from one or more operating parameters. As known in the prior art, for example in European Patent 665 628 or German Patent 41 06 725, such a control signal according to one or more operating parameters of the battery unit is such that the battery unit reaches a preset drain threshold. Is used to block or reduce current flow from the battery unit to the electrical device 20 connected thereto. Alternatively, when the battery unit 10 is connected to the charging device 30, the charging step is interrupted or reduced when the upper charging threshold or the upper temperature threshold is reached, that is, the charging device 30 and the battery. Control signals are provided to allow current flow between units 10 to be blocked or reduced. The mentioned control signal outputs the monitoring circuit 14 via a signal line 15 which is directed to an external signal line connection 3.

2 shows an electrical device 20 connectable to the battery unit 2. In the electric device 20, the electric drive part 21 which is a normal electric motor is provided. Supply lines 22 and 23 which can be connected to supply lines 12 and 13 of the battery unit 10 are guided to the electric drive 21. One of the two supply lines 22, 23 is provided with an electrically controllable switch 24. As an electrically operable switch, a metal oxide semiconductor development effect transistor (MOS-FET) is commonly used. Switching means 25 are provided in the electrical device 20 for control of the switch 24. The switching means 25 receives a control signal from the battery unit 10 via a signal line 26 connected to an external signal line connection 3.

According to the information for transmitting the control signal from the battery unit 10 about the discharge state of the battery unit 10, the switching means 25 controls the switch 24. For example, if the monitoring circuit 14 in the battery unit 10 indicates that the preset drain threshold is not reached, the control signal transmitted to the switching means 25 correspondingly opens the switch 24. The electrical device 20 can no longer draw current from the battery unit 10. Instead of abruptly shutting off the power of the electrical device 20, in some cases a gradual drop in power can be effected via the switching means 25 in accordance with the control signal transmitted by the monitoring circuit 14. In general, the power withdrawal via the electrical device 20 can be controlled via the switching means 25 such that the maximum limit value of the power draw is always adapted to the actual state of charge of the battery unit 10. In this way, the battery unit 10 is operated with the longest possible life.

In the charging device 30 shown in Fig. 3, a controllable current source or voltage source 31 is provided. The controllable current source or voltage source comprises on the one hand power supply connections 4, 5 and on the other hand directs supply lines 32, 33 to external supply line connections 1, 2. Via signal line 34, which is guided to external signal line connection 3, controllable current source or voltage source 31 receives a control signal formed by monitoring circuitry 14 in battery unit 10. The switching means in the controllable current source or voltage source 31 are formed in the battery unit 10 and flow through the supply lines 32 and 33 to the battery unit 10 in accordance with a control signal transmitted to the charging device 30. Control the charging current. In particular, the control signal signals the switching means in the controllable current source or voltage source 31 when the battery unit 10 reaches the upper limit charging threshold, and consequently the charging current from the controllable current source or voltage source 31. Is blocked or gradually degraded.

As described above, information exchange is formed through signal lines 15, 26, 34 between the battery unit 10, the electrical device 20, and the charging device 30. The information exchange can be guided from the battery unit 10 to the electrical device 20 or the charging device 30 in a single direction, as well as in the opposite direction. By mutual exchange of information about the actual operating state of each device 10, 20, 30, the high wear of the load and the corresponding device can be continuously reduced.

Preferably, the signal lines 15, 26, 34 for exchanging information with each other are constituted by bus lines capable of transferring control signal data in a single direction or in both directions as a series of data currents.

According to the present invention, by relocating the switching means from the battery unit to the electric device and the charging device, heat generation in the battery unit can be prevented and the size of the battery unit can be reduced.

Claims (8)

At least one battery operated electrical device 20, a rechargeable battery unit 10 and a battery charging device 30, the battery unit 10 being capable of detecting operating parameters of the at least one battery unit 10 1. An apparatus system comprising a monitoring circuit 14 for supplying a control signal in accordance with operating parameters for the switching means 25, 31 for controlling the charging and discharging process of the battery unit 10. In order to control the voltage according to the control signal output by the monitoring circuit 14 of the battery unit 10, a switching means 25 is provided in the electric device 20, from the charging device 30 to the battery unit 10. And a switching means (31) is provided in the charging device (30) for controlling the charging current supplied to. An electrical device 20 is electrically connectable to the energy supply of the battery unit 10, a charging device 30 is electrically connectable to the recharger of the battery unit 10, and at least one operation of the battery unit 10 is performed. A battery unit comprising a monitoring circuit 14 for detecting a variable and inducing control signals therefrom for controlling the charging and discharging process, Means 15 for supplying control signals to the switching means 25, 31 provided outside the battery unit 10, that is, in the electric device 20 and the charging device 30, and the electric device 20. Switching means 25 in the () is provided for controlling the power in accordance with the control signal of the battery unit 10, the switching means 31 in the charging device 30 is from the charging device 30 to the battery unit 10 A battery unit, characterized in that it is provided for controlling the charging current supplied to. In a charging device for a battery unit 10 comprising a monitoring circuit 14 for detecting an operating variable of at least one battery unit 10 and inducing a control signal for control of the charging process therefrom, Charging device characterized in that a switching means (31) is provided for controlling the charging current supplied from the charging device (30) to the battery unit (10) according to the control signal of the battery unit (10). An electrical device, to which an energy supply can be connected, to the battery unit 10 comprising a monitoring circuit 14 for detecting operating variables of at least one battery unit 10 and inducing control signals therefrom for controlling the discharge process. In An electric device characterized in that a switching means (25) is provided for controlling power in accordance with a control signal of the battery unit (10). The battery circuit 10 according to claim 1, wherein the monitoring circuit 14 in the battery unit 10 is a current drawn into or out of the battery unit 10 as an operating variable or a terminal voltage of the battery unit 10 or the battery unit 10. Device for detecting a temperature or a variable related to temperature. 3. The monitoring circuit 14 in the battery unit 10 is characterized in that the current drawn into or out of the battery unit 10 or the terminal voltage of the battery unit 10 or the temperature of the battery unit 10. Or detecting a variable related to temperature as an operating variable. 4. The control signal for controlling the switching means (31) according to claim 3, wherein the control signal for controlling the switching means (31) is dependent on the charging current drawn into the battery unit (10) or the terminal voltage of the battery unit (10) or the temperature or temperature of the battery unit (10). Charging device characterized in that the following. The control signal for controlling the switching means 25 is according to the current drawn from the battery unit 10 or the terminal voltage of the battery unit 10 or the temperature or a variable related to the temperature of the battery unit 10. An electric device, characterized in that.

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